Not bad. I do have a few tips though.
1. The animation was pretty enjoyable, but it kinda ended weirdly. I think it may be the limitations of scratch that made you end it this way. I recommend you use something like Flash or if Flash is too expensive (Which it is for me,) you should definitely use Wick Editor (It's free). It's a lot like flash and even runs on web browsers.
2. Looks like you forgot a restart button whoops.
3. I recommend that you make your animations longer too. Maybe around the 1 minute mark? I think it may make you move a little more enjoyable.
4. The computer voice you chose was kind of annoying.
In conclusion, I see a lot of potential in this series of yours. I just think it'll benefit from some improvement. I wish you good luck.